This name is a synonym of Malus komarovii (Sarg.) Rehder.
The record derives from RJP
(data supplied on 2011-10-18)
which reports it as a synonym (record 7150) with original publication details: Plantae wilsonianae Plantae wilsonianae; 1911 183 1912.
This name record (from RJP) was not included in version 1 of The Plant List. It is possible the same name was included from a different data source, to check this you can search for Crataegus komarovii in version 1 of The Plant List.